Choosing principal values

Choosing principal values

Secondary 4
3 marks
TGM Original Questions

Without using a calculator, find the following principal values.

  1. \(\sin^{-1}(-1/2)\), in radians.[1]
  2. \(\cos^{-1}(-\sqrt3/2)\), in degrees.[1]
  3. \(\tan^{-1}(\sqrt3)\), in radians.[1]

Solution:

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Similar questions are unavailable for this question.
Answer:(a) \(-\pi/6\). (b) \(150^\circ\). (c) \(\pi/3\).

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